In App Designer, how can I refer to the controls in one GUI from another GUI?

Basically, in App Designer, I have 2 GUIs opened at the same time: GUI1_App and GUI2_App. GUI1_App includes a "Static Text" while GUI2_App includes a "Push Button". I would like the Color property of the Static Text in GUI1_App to change when I push the Push Button on GUI2_App.

Essentially, my question is how can I refer to the controls in GUI1_App from GUI2_App? how can I refer to the controls in GUI1_App from GUI2_App?

[Adam]

For reasons best known to Mathworks appdesigner gives public access to all UI components created so you simply access the relevant UI component and do whatever you want with it. It's horrible from a code design perspective, but appdesigner lets you do it easily.

e.g. in app1, so long as you have access to app2, having kept its handle when you launched it:

app2.myStaticText.Color = 'r';

or whatever you wish.

[Ahmed]

Thank you. I tried that and it did not work. Could you please specify exactly ehat you mean by "having kept its handle when you launched it"

[Adam]

app1 = GUI1_App;
app2 = GUI2_App;

so you keep hold of the handle of the app that you just launched. Then you have its class and access to all its properties.

[Ahmed]

Well, just to clarify:

1) GUI2_App is launched from GUI1_App.

2) I need to control GUI1_App handles from GUI2_App code.

Where should I add this app1=GUI1_App command?

If I added this in GUI2_App, it reopens GUI1_App

[Adam]

You will need to pass GUI1_App into GUI2_App when you launch it. GUI1_App should be called app in the function where you launch GUI2_App. Passing arguments to an app as described in

https://uk.mathworks.com/help/matlab/creating_guis/app-designer-startup-function.html

Answer 1

[Ahmed]

After doing some research, the solution to this question can be found in this Matlab example:

https://uk.mathworks.com/help/matlab/creating_guis/creating-multiwindow-apps-in-app-designer.html

Answer 2

[Sai Sri Pathuri]

You can refer the following answer

https://in.mathworks.com/matlabcentral/answers/346480-how-to-control-the-apperance-of-a-ui-control-from-another-gui?s_tid=answers_rc1-2_p2_MLT

[Ahmed]

Thank you. I'm aware of this answer. However, it works in GUIDE and doesn't work in App Designer